L7: Torque Limit - YASKAWA GA700 Technical Manual

Mechanical weakening is detected when the speed (absolute value) is more than or equal to the value set in L6-09.
oL5 is output after detection, and operation stops.
5 : Alm Spd<L6-09
Mechanical weakening is detected when the speed (signed) is less than or equal to the value set in L6-09. UL5
[Mechanical Weakening Detection 2] is output, but operation continues after detection.
6 : Alm [Spd]<L6-09
Mechanical weakening is detected when the speed (absolute value) is less than or equal to the value set in L6-09.
UL5 is output, but operation continues after detection.
7 : Flt Spd<L6-09
Mechanical weakening is detected when the speed (signed) is less than or equal to the value set in L6-09. UL5 is
output after detection, and operation stops.
8 : Flt [Spd]<L6-09
Mechanical weakening is detected when the speed (absolute value) is less than or equal to the value set in L6-09.
UL5 is output after detection, and operation stops.
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L6-09: MechanicalWeakeningDetectSpdLvl
No.
Name
(Hex.)
L6-09 MechanicalWeake
ningDetectSpdLvl
(0469)
Overtorque/undertorque detection criteria is set in L6-01 to L6-03 [Torque Detection 1 Settings Parameters].
The setting value of L6-09 is recognized as the absolute value when L6-08 = 2, 4, 6, 8 [Mechanical Weakening
Detect Ope = Speed : unsigned]. This value is processed as a positive number even if L6-09 is set to a negative
number.
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L6-10: Mechanical Weakening Detect Time
No.
Name
(Hex.)
L6-10 Mechanical
Weakening Detect
(046A)
Time
Detects mechanical weakening when the detection criteria selected with L6-08 [Mechanical Weakening Detect
Ope] continues for at least the time set in L6-10.
■
L6-11: MechanicalWeakeningDetectSrtTime
No.
Name
(Hex.)
L6-11 MechanicalWeake
ningDetectSrtTime
(046B)
The mechanical weakening detection function executes when the cumulative operation time of the drive exceeds
the value set in L6-11. The drive cumulative operation time can be monitored by U4-01 [Cumulative Ope Time].
◆

L7: Torque Limit

The torque limit function limits torque generated by the motor to a constant amount by limiting the internal torque
reference for the drive. This function is used to keep torque applied to loads and the generation of regenerative
torque below a specific amount. This function protects machinery and improves reliability of continuous
operation. Torque limits can be set individually for the four quadrants, which include torque direction (motoring/
regeneration) and direction of motor rotation (forward/reverse). When the torque reference value reaches the set
torque limit, the MFDO terminal set for During Torque Limit [H2-xx = 30] turns ON.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
On the basis that E1-04 [Maximum Output Frequency] is the 100% value,
this parameter sets the speed level at which the mechanical deterioration
detection function operated as a percentage.
V/f CL-V/f OLV CLV AOLV
Sets the time for mechanical deterioration detection.
V/f CL-V/f OLV CLV AOLV
Sets the time at which mechanical deterioration detection is started using the
cumulative operation time of the drive as a trigger.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.9 L: Protection Function
Default Setting
(Range)
110.0%
(-110.0 - 110.0%)
Default Setting
(Range)
0.1 s
(0.0 - 10.0 s)
Default Setting
(Range)
0 h
(0 - 65535 h)
11
861